Add 25/45 and 21/40
25/45 + 21/40 is 389/360.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 45 × 8 = 360,
25/45 = 25 × 8/45 × 8 = 200/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
21/40 = 21 × 9/40 × 9 = 189/360 - Add the two like fractions:
200/360 + 189/360 = 200 + 189/360 = 389/360 - So, 25/45 + 21/40 = 389/360
In mixed form: 129/360
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